8. Maintenance
As operation can be affected by dust, it is recommended to cover your Turntable between operating sessions.
Zero Point: Make sure this area and the pit edge is always clean and free of dust.
Use Propyl Alcohol or a similar cleaner to clean the contacts on the bottom of the bridge and in the pit, should
they get dirty.
Important note: Any time the bridge is removed from the pit, you must calibrate (see 6B) before resuming
operation in order for the bridge to find the positions correctly.
Lubrication: In normal use, the drive mechanism should only require servicing about once a year. Use plastic
compatible lubricants made especially for hobby products – NEVER use household oils or lubricants!
Remove the screws from the cover. Apply a drop of light oil to both motor bearings and the drive gear train. (See
Fig. 5)
Reverse these steps to reassemble – make sure the motor leads are positioned as shown.
FIG. 5
9. FAQ
If the bridge doesn’t stop at programmed position and won’t move again or the control box
reads ``C´´:
Proper contact is not being made between the wipers and the bridge centre post. See 4C for cleaning contacts
and finish by Calibrating, see 6B.
If the bridge, in “Prog. Mode”, is running much slower CCW than CW:
It is recommended to let it run at least 1 turn CCW in “Prog. Mode”. Then the mechanical parts will be more
flexible.
When driving the bridge to another stop the bridge does not stop exactly at the set position:
1. Possible cause: The bridge has been removed from the pit or its position has been altered by hand or the
power supply has been interrupted while the bridge was moving or a position has just been programmed.
Calibrate the bridge again (see section 6B).
2. Possible cause: When setting a new stop the positioning of the bridge was not finished in the same direction
it was started. Due to technical reasons this does not allow an exact re-finding of the position. Delete the position
and set it again (see chapter 6D).
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